I picked up a juvenile Big Eyed a couple days ago and I've been doing research on how to keep the little guy happy and healthy but I'm still lacking the knowledge I'd like to know about them.

What is their desired Temp and Humidity?
Do they stay burrowed for days at a time?
I want to add Nightcrawlers to the substrate, will they try to eat them? Are they a choking hazard?
What size of tank is adequate for one juvenile?
What size crickets should I feed him?
Is it safe to stick another baby/juvenile Big Eyed with my current one?
My Big Eyed seems to be verrrry shy to its new surroundings, will he warm up to his enclosure over time?

I know this topic is question heavy but any answer or information will help! I want to be a good owner for this little guy.